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Help required for setup Expressway C & E



I am trying to setup MRA .

But its unsuccessful. and getting the error in the status > unified communication

I am not using any TLS and have not uploaded any certificate since i am not using a secure deployment.

any help in troubleshooting appreciated.


so that means your is working fine.

first, check 5222 port is open from external network 

use this site to check firewall ports

Make sure your IMP is active in expressway-C.

Important Note: Define your internal as well as external domain in expressway-c and enable cucm and IMP registration for the public domain. it seems you are using the only internal domain in expressway-c no issues define external domain also inside the domains option.

if a still issue is there then delete IMP and CUCM servers and add again.

Make sure you are using Public CA or Open SSL because  certificate is mandatory to log in from outside:

Best practice is to use external public CA because open SSL will not help you to register your IP phone, Dx series, telepresence endpoints over the MRA.

Note: while signing CSR keep in mind expressway will not support wildcard certificate 

Hi  Sushant

I tired troubleshooting the issue today and this time i am getting the " cannot communicate with server error " from internet.

The error is not consistent last time when i checked it was giving username and password invalid error.

I am attaching a fresh log from express c,e and jabber PRT

If you want to resolve issue you need to troubleshoot step by step .

I can see in logs is not resolving from externally .

try below commands from your side.

1) SRV Records not working externally >

Default Server: Cisco00447

> set type=srv
Server: Cisco00447

*** No Service location (SRV) records available for

2) No Public CA valid certificate installed in expressway-e check attached images 

check SRV records because traffic is not reaching expressway-e 

Hi Sushant

The domain you are looking is my internal domain

my external domain is

Non-authoritative answer:        SRV service location:
          priority       = 10
          weight         = 10
          port           = 8443
          svr hostname   =        internet address =
I don't have a public CA  service .I have my internal CA that I have used to sign the Expressway C & E CSR.
The tunnel between C & E is active
I have created both internal and external domain in the expressway